Levels of evidence
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In evidence-based medicine, levels of evidence is a ranking system used to describe the strength of the results measured in a clinical trial or research study. The design of the study (such as a case report for an individual patient or a double-blinded randomized controlled trial) and the endpoints measured (such as survival or quality of life) affect the strength of the evidence.
[edit] External links
- Levels of evidence entry in the public domain NCI Dictionary of Cancer Terms
- Evidence and diagnostics
- EBM resources page, with a diagram showing different levels of evidence forming a pyramid
This article includes text from the U.S. National Cancer Institute's public domain Dictionary of Cancer Terms
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